Engine.



- F. W. RUGGLES.

ENGINE.

APPLIOATION FILED SEPT. z, 1909.

Patented Nov. 25 1913.

WITNESSES- LVVENTOR,

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A TTORNEY.

UNITED STATES PATENT OFFICE.

FRANK W. RUGGLES, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR ONE-HALF TO EMERSON G. GAYLOBD, OF CH IUOPEE, MASSACHUSETTS.

Emer ta.

Patented Nov. 25, 1913.

Application filed September 2, 1909. Serial 1101515343.

To all whom it may concern:

Be it known that I, FRANK W. RUcGLEs, a citizen of the United States of America, and resident of Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful I111- provements in Engines, of which the following is a full, clear, and exact description.

This invention relates to improvements in engines, which are more especially applicable in the organization of-gas engines of the two cycletype'; and the object thereof is to render the engine more flexible, and efficient, as well as convenient, in operation, as accomplished by the means comprised in the engine for having the period of admission of the gas or mixture by way of the carbureter into the cylinder,or into the crank-case chamber, from which it ulti mately passes to the cylinder,at difi'erent port-ions of the cycle .or back and forth movements of the crank-shaft operating cylinder piston; the beneficial" results in the operation of the engine being augmented by provisions for operating the throttling valve of the carbureter concurrently with the action of the means for advancing or delaying the time when :the'inlet' valve is open for the admissionof the gas to the engine.

The invention consists in the combination and arrangement in, and for forming partof, the engine all substantially as herein-' after described and set forth in the claims.

An example of a gas engine in which the present invention is' embodied is afforded in the accompanying drawings in which;

-Figure l is a front? elevation of atwo cylinder two cycle engihe equipped with the present improvements,-'parts being in vertical section for clearer illustration. Fig. 2 is a vertical cross section of the engine on line 2-2, Fig. 1. Fig. 3 is a sectional view of parts in detail as taken on the line 33, Fig. 1. 1

Similar characters of reference indicate correspondingparts in all of theviews.

In the drawings the body of the engine is shown as comprising duplex cylinders A'A, the inner ends of which are in open communication with the crank-cases 13-13, C representing one of the pistons, in Fig. 2, which by the pitman rod 10 is connected with the crank 12 of the engine shaft 13.

D represents the casing having cylindrical spaces in which are fitted the rotary valves E which are mounted on a shaft that 1s caused to rotate concurrently with the engine shaft, as driventhereby so that the port 14 of the valve will once in each rotation register with and leave open the port 15 which afiords at suchtime communication. by way of the gas inlet passage or branch 16 of the valve casing D between the carbureter G and the interior of the engine. The valve appurtenant to each cylinder is mounted on, andaflixed to, a shaft-section 20 which is arranged axially within the valve cas'ing, an end thereof protruding outwardly beyond such casing, and in alinement with such shaft section 20 is another shaft section 22 at or near an outer end of which is a spur gear 23 in mesh with a spur gear 24 affixed on-the engine shaft 13. and by reason of which gearing the shaft section 22 is caused to rotate in unison with the crank shaft. The shaft section "22 has at its end portion next to the shaft secti0n'20 a longitudinal groove 25 while the shaft section'20 has at its end portion a resented in Fig. 1 being of spiral form.

'27 represents a" peripherally' grooved sleeve having in different proportions of the length thereof inwardly extending projections- 29 and 30 which engage respectively in the straight longitudinally ranging groove 25 of the shaft section 22 and in the cam groove 26 of the shaft section 20; and 32 represents a lever intimately pivoted vided at its one end with a yoke 33 having inwardly extending blocks 34 or studs, which engage in the peripheral groove of which must always rotate with the shaft sections 20 and 22 may 'be moved either to the right or left, when the lever is correspondingly swung to cause, relatively a rotative forward or. backward movement of the shaft section 20.

35 represents the stem of the throttling valve of the carbureter G having a cranklever36 thereon which by link 37 is connected to the sleeve operating yoke lever 32; and thus the action of advancing or retarding the valve is conjoint with the action down the carbureter.

peripheral cam groove 26 the same as rep-v on the exterior of the engine body and prowidely opening or restricting or throttling the slidable sleeve-27, so that the sleeve The mixture or carbureted air in passing through the port of' the rotary valve and theadmission port 15 is drawn into the crank case chamber on the upstroke of the piston, and is compressed in the crank case chamber-on the down stroke of the piston and is admitted when the piston is near the limit of its down stroke through the passage '38 into the cylinder above the piston, to be further-compressed on the piston upstroke and ignited at the instant desired, all as usual in this type of gas engine.

It is to be understood that this engine is in its construction and mode of operation generally the same as that of the usual or most common type of two cycle engines, that is, theorganization is such that the intake of the motor fluid into the crank case is at -a time when the communication between the crank case and cylinder above the piston, through the passage 38, is closed; and, moreover, it is'true of this engine 'as of the usual two cycle engine that the amount of the charge admitted into the crank case while the port into the crank case is opened, will be more or less according as to whether the piston has moved far on its upward stroke creating considerable vacuum in the crank represented in Fig. 2, that is open at an early stage in the upstroke of the piston,-and to become closed correspondingly early, the

admission of the motor fluid into the crank case is at a time when there is aslilgkht degree of effective vacuum in the era case,

so that, consequently the quantity of the charge which will enter the crank case will i be correspondingly slight; but by imparting an adjustment rotatively to the valve so that it is set. back considerably, and so that it will be opened much laterin the upstroke of p the piston, the admission port for the intake of the charge is opened at a time when a high degree of vacuum shall have been created, so that the charge then taken in the crank case foropera-tlon in the succeedingcycle or explosion isquantitively' a very considerable one, and one which will prod ce on the explosion thereof after it shall h ve been transferred into the cylindera piston stroke of very much greater power; and concurrently with the operation of the sleeve 27 for positioning the rotary inlet valve E the throttle valve of the carbureter is, through the connections 36 and 37, with the yoke lever 32 which controls the valve adjusting sleeve 27 so positioned that there may be a greater access of the motor fluid through the carbureter into the crank case when the inlet valve is opened late in the upstroke of the piston than would be the case were the connected and coacting parts positioned so as to secure an opening of the admission-port 15 at an early stage in the upstroke of the piston.

This invention is not to be considered as limited to the details of construction and the particular arrangement of the parts here shown and described for the accomplishment of its object, as various changes of minor character may be made without departing from, or sacrificing the advantages of, the invention,

I claim 1. In a two-cycle explosive engine, a body comprising a cylinder, a piston therein, a closed crank case, said body having a passage leading from the closed chamber in the crank case for admission into the cylinder, and relatively to the inner port of which passage the piston operates as an opening and closing valve, and said body' having therein a passage for amotor fluid with a port for the admission of such fluid into the closed crank case chamber, a rotary inlet valve having a port for alternately opening and closing said crank case port, means for causing rotation of the said valve, the engine shaft having a crank in the said casing which is connected with the cylinder piston, and means for rotatively adjusting the said valve whereby in its rotations its port will be, as desired, in open relation to the said crankcase admission port at an early or late period during the operation of the piston.

2.- In a two cycle explosive engine, a body comprising a cylinder, a piston therein, a closed" crank case and having a passage leading from the-closed crank case chamber for admission into the cylinder and relatively to which passage thepiston operates as antopening and closing valve, and said body having a passagetherein for a motor fluid with a port for admission of such fluid into the closed crank case chamber. an engine shaft having a crank in said closed chamber and connected with the cylinder piston, a rotary inlet valve having a port for alternately opening and closing communication with the crank case admission port, a shaft section on which said valve is mounted, another shaft section d riven'by the engine crank shaft and in driving connect-ion with the valve shaft, and means for causing a rotative adjustment of the valve carrying shaft section relatively to the said driving shaft section.

. 3. In a two cycle explosive engine, an engine body comprising. a cylinder, a closed crank case, a rotary valve, a motor-fluid passage in which said valve is located, said passage conducting the motor fluid to the crank case, and a passage leading from the closed crank case into the cylinder, two alined shaft-sections, one thereof carrying a rotary inlet valve having a port for successivelyopening and closing said fluid passage, and the other of said shaft-sections being in driving connection with the engine crank shaft; and the adjacent ends of said shaft sections having, the one a groove parallel with its axis and the other a cam groove, a sleeve surrounding and slidable relatively to the contiguous ends of the shaft-sections, and having inwardly extending projections engaging in the grooves in such shaft-sections, and means for moving the sleeve.

4. In a two cycle explosive engine, a body comprising a cylinder and a closed crank case, and having a passage leading from the crank case into the cylinder, a valve-casing having a port for the admission of motor fluid from such easing into the crank case, a carbureter connected with the said valve casing having a throttling valve provided with an operating stem, and a rotary inlet valve in said valve casing having a port for alternately.

opening and closing communication withthe said crank case port, means for causing rotation of the said valve in unison with the engine crank-shaft, means for rotatively adjusting said valve whereby in its rotations its port will be, as desired, in open relation to the admissionport at an early or late period during the piston stroke, and a con nection between the'engine inlet valve adjusting means, and said stem of the carbureter throttling valve whereby the latter maycrank casing connected with the piston, a

rotary inlet valve in said valve casingvhaving a port for alternately opening and closing communication with the crank case, two alined shaft-sections, one thereof carrying said rotary inlet valve and the other of said shaft-sections being in driving connection with the engine crankshaft, the adjacent end portions of said shaft-sections having, the one a groove parallel with its axis and the other a peripheral cam-groove, a pcripherally grooved sleeve surrounding and slidable relatively to the contiguous ends of the shaft-sections and having inwardly extending projections engaging in the grooves ofsuch shaft sections, a yoke lever engaging the grooved sleeve, and a connection between the yoke lever and the stem of the carbureter throttling valve.

6. In a two cycle explosive engine, comprising the usual cylinder having a piston therein and an entirely closed crank case and a passage for a motor fluid having a port for admission of the latter intosa-id crank case, the engine shaft having a crank in said crank case connected with the piston, a ro tary inlet valve having a port for alternately opening and closing said admission port,

.means for causing rotation of said valve in unison with the engine crank shaft, and means for rotatively' adjusting said valve whereby in its, rotations its port will be, as desired, in open relation to the said admission port at varying periods during the pisforming element, means for conducting the charge from said charge forming element to said crank case, a valve for controlling the admission of said charge to said crank case and variable means for insuring the opening of said valve at varying periods in the upstroke of the piston whereby said valve is caused to open under varying conditions of rarefaction of the content of the crank case. Signed by me at Springfield, Mass, in presence of two subscribing witnesses.

FRANK W. RUGGLES.

' Witnesses:

G. R. DnIsooLL, WM. S. BELLOWS. 

